/*
 * Copyright 2010-2012 Susanta Tewari. <freecode4susant@users.sourceforge.net>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package javautil.stat.desc;

import javautil.collections.ArrayUtil;
import javautil.lang.MathUtil;

/**
 *
 * @author stewari1
 */
public class FrequencyUtil {

    public static int[] getRowSums(int[][] data) {

        int[] result = new int[data.length];

        for (int i = 0; i < result.length; i++) {

            result[i] = MathUtil.Sum(data[i]);
        }

        return result;
    }

    public static int[] getColSums(int[][] data) {

        if (ArrayUtil.isRagged(data)) throw new Error("data is ragged. can`t compute col sums");

        int[] result = new int[data[0].length];

        for (int i = 0; i < result.length; i++) {

            result[i] = MathUtil.Sum(ArrayUtil.getCol(data, i + 1));
        }

        return result;
    }
}
